Among the following acids,which has the lowes | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(B) The $pK_a$ value is inversely proportional to the acid dissociation constant $(K_a)$,i.e.,$pK_a = -\log(K_a)$.Therefore,the acid with the highest

Vedclass · Accepted Answer

$HCOOH$

Vedclass · Answer

(B) The $pK_a$ value is inversely proportional to the acid dissociation constant $(K_a)$,i.e.,$pK_a = -\log(K_a)$.Therefore,the acid with the highest $K_a$ value will have the lowest $pK_a$ value.Among the given carboxylic acids,formic acid $(HCOOH)$ is the strongest acid because the hydrogen atom attached to the carboxyl group exerts no electron-donating inductive effect ($+I$ effect),whereas alkyl groups in other options ($CH_3-$,$CH_3CH_2-$,$(CH_3)_2CH-$) exert a $+I$ effect,which destabilizes the carboxylate anion and decreases acidity.Thus,$HCOOH$ has the highest $K_a$ and the lowest $pK_a$ value.

Among the following acids,which has the lowest $pK_a$ value?

Similar Questions

Identify the structure of product $A$ in the following reaction:
$\text{Cyclohexanecarboxylic acid} \xrightarrow{LiAlH_4} A$

The reaction between acetic acid and ammonia gives

The reagent used in the preparation of aspirin from salicylic acid is

Formic acid on heating with concentrated $H_2SO_4$ at $373 \ K$ gives $X$,a colourless substance and $Y$,a good reducing agent. The number of $\sigma$ and $\pi$ bonds in $X$ and $Y$ are respectively:

Identify the product $P$ of the following reaction:
Ethanoyl chloride $\stackrel{H_2O}{\longrightarrow} P$

Vedclass Test Series

Exam Paper Generator

Online Exam Module